I have a Little Giant in a taller size. When I got mine it came with 3 accessories, a work platform, the wall stand out arm attachment & a leg leveling attachment. The leg leveler could be attached to any leg & additional leg levelers or work platforms could be bought if you wanted. I got an extra work platform.
A couple years back I had the need for 2 of these ladders so I could use them as a tall scaffold. I picked up a ladder very similar to the one in the HF pic & its a good ladder. Its worked well since day one & I still use it regularly
BUT!!!
It's not a Little Giant ladder. Put them side by side & the difference is obvious. The L.G. is visibly beefier, pick them up & you know it.. Climb (please, 1 ladder at a time

half way up the two at full extension & WOW!! That's when the difference really becomes obvious.
Not that the cheaper one is unsafe in any way but the Little Giant gives me a lot more confidence that the cheaper one does. I don't know the ratings, but the L.G. feels way more capable.
Both mine are the 22' version (5 rung) & when I set them up side by side as full height step ladders the cheaper one is about 2 or 3 inches shorter at the top. Not that its a problem except for when using them as scaffolding the cheaper ladder needed an extra 2 pieces of 2x6 stacked on the cross pieces so the walkway was semi level.
Overall what I'm saying is that the difference in price is justified. And that there is a place for both/either. I like the cheap one because it's way easier to carry around & to maneuver in tight areas. I like the L.G. when carrying weight up the ladder & I use it almost exclusively when using as a straight ladder (not in step form) .
Steve